Glossary

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Looking for a quick definition?

We’ve got loads of key subject terms in our subject glossaries. There are three ways of finding what you are looking for:

  • First click on the letters of the alphabet to browse for terms.
  • Select a subject from the drop-down menu above to filter the terms by Subject.
  • Or lastly, type the term you are looking for into the search box.

EXAMPLES

Here are some examples of the kinds of definitions you’ll find on this page.

Subject:

biological classification group (taxon) that is divided into species (the plural of genus is...

Subject:

narrow external opening to the gill chamber.

Subject:

organs of gaseous exchange in many animals that live in water.

Subject:

is the gradual increase in the average temperature of Earth's atmosphere and oceans.

Subject:

a cluster of capillaries situated inside Bowman's capsule in the nephron.

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